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AssuredElectrical, Master Electrician
Category: Electrical
Satisfied Customers: 4241
Experience:  Contractor-42+ Years in the ElectricalTrade
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What is the code 480 3 phase under existing

Customer Question

what is the code for installing 480 3 phase under existing concrete road. Is red concrete required?
Submitted: 2 years ago.
Category: Electrical
Expert:  AssuredElectrical replied 2 years ago.
Welcome. My name is ***** ***** would be glad to assist. Can you elaborate on the installation?What is the "Red concrete"? Is this in the engineers specifications for cover?Since the road is existing, Are you boring under the street?Details will help to evaluate, so as much as possible on the situation itself. Thanks
Customer: replied 2 years ago.
Yes we are boring under street. we are installing red concrete in trench as required, but is it required under roadway?
Expert:  AssuredElectrical replied 2 years ago.
Ok, thanks for the details.There is nothing in the NEC that requires underground conduits to be covered by "red" or any other concrete, provided the installationmeets all of the other requirements of 300.5.I know it is sometimes written into the project specs by the engineering firms or as a local ordinance requirement.This helps to identify the circuit easier and also is a harder substance to be broken in case of disturbances.You definitely need to consult the county, city or local municipality on any "EXTRA" requirements they may have on the situation.But, again, as far as the NEC requirements, there are NONE for the red concrete.Just the underground requirements of 300.5.
Expert:  AssuredElectrical replied 2 years ago.
This is all the NEC requires, anything else would be from the design engineering or the local authorities.